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'''OpenGL extension APPLE.flush_buffer_range |
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This module customises the behaviour of the |
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OpenGL.raw.GL.APPLE.flush_buffer_range to provide a more |
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Python-friendly API |
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Overview (from the spec) |
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APPLE_flush_buffer_range expands the buffer object API to allow greater |
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performance when a client application only needs to write to a sub-range |
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of a buffer object. To that end, this extension introduces two new buffer |
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object features: non-serialized buffer modification and explicit sub-range |
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flushing for mapped buffer objects. |
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OpenGL requires that commands occur in a FIFO manner meaning that any |
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changes to buffer objects either block until the data has been processed by |
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the OpenGL pipeline or else create extra copies to avoid such a block. By |
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providing a method to asynchronously modify buffer object data, an |
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application is then able to manage the synchronization points themselves |
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and modify ranges of data contained by a buffer object even though OpenGL |
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might still be using other parts of it. |
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This extension also provides a method for explicitly flushing ranges of a |
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mapped buffer object so OpenGL does not have to assume that the entire |
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range may have been modified. |
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Affects ARB_vertex_buffer_object, ARB_pixel_buffer_object and OpenGL 1.5 |
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Buffer Objects. |
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The official definition of this extension is available here: |
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http://www.opengl.org/registry/specs/APPLE/flush_buffer_range.txt |
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''' |
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from OpenGL import platform, constant, arrays |
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from OpenGL import extensions, wrapper |
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import ctypes |
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from OpenGL.raw.GL import _types, _glgets |
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from OpenGL.raw.GL.APPLE.flush_buffer_range import * |
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from OpenGL.raw.GL.APPLE.flush_buffer_range import _EXTENSION_NAME |
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def glInitFlushBufferRangeAPPLE(): |
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'''Return boolean indicating whether this extension is available''' |
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from OpenGL import extensions |
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return extensions.hasGLExtension( _EXTENSION_NAME ) |
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